An application of a modified microwave total dissolution technique for soils

Animons, J. T.; Essington, Michael E.; Lewis, Russell J.; Gallagher, A. O.; Lessman, G. M.

doi:10.1080/00103629509369338

Cited by 19 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More vigorous HNO 3 + HCl + HF digestion methods (like EN 13656 applied to wastes [11]) provide satisfactory dissolution of silica matrices [12][13][14][15]. These methods use microwave-assisted acid digestion for "total" sample decomposition and are applicable to up to 30 elements.…”

Section: Introductionmentioning

confidence: 99%

The role of different soil sample digestion methods on trace elements analysis: a comparison of ICP-MS and INAA measurement results

et al. 2007

View full text Add to dashboard Cite

The measurement of trace-element concentration in soil, sediment and waste, is generally a combination of a digestion procedure for dissolution of elements and a subsequent measurement of the dissolved elements. "Partial" and "total" digestion methods can be used in environmental monitoring activities. To compare measurement results obtained by different methods, it is crucial to determine and to maintain control of the bias of the results obtained by these methods. In this paper, ICP-MS results obtained after matrix digestion with modified aqua regia (HCl + HNO 3 + H 2 O 2 ) method and two "total" digestion methods (microwave aqua regia + HF and HNO 3 + HF) are compared with those obtained by instrumental neutron activation analysis, a nondestructive analytical method for the determination of the total mass concentrations of inorganic components in environmental matrices. The comparison was carried out on eight agricultural soil samples collected in one test area and measured by k 0 -INAA and ICP-MS to determine As, Co, Cr, Sb and Zn mass concentration. The bias of results for As, Cd, Co, Cr, Cu, Ni, Pb, Sb and Zn of the three digestion methods were assessed using selected measurement standards. This

show abstract

Section: Introductionmentioning

confidence: 99%

The role of different soil sample digestion methods on trace elements analysis: a comparison of ICP-MS and INAA measurement results

et al. 2007

View full text Add to dashboard Cite

show abstract

“…The content in the volumetric flask is then brought to volume with DDI water. Method MICRO is microwave digestion (Warren et al, 1990;Ammons et al, 1995) NIST certified SRM value lies outside 95% confidence interval for experimental mean. c n.r., data not reported; n.d., data not determined.…”

Section: Dissolution Methodsmentioning

confidence: 99%

Total elemental analysis digestion method evaluation on soils and clays

Wilson

Burt

Lynn

et al. 1997

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

The standard digestion method for total elemental analysis of soil material by the Soil Survey Laboratory (USDA Natural Resources Conservation Service) uses a 2-mL clay suspension with hydrofluoric acid (HF) in a closed Teflon digestion vessel (method HF-SUS). The accuracy and efficiency of elemental recovery by method HF-SUS was compared to: (a) modification of HF-SUS by use of a dried sample (method HF-DRI); (b) modification of HF-SUS by use of a dried sample and HF+aqua regia (method HF+AR); (c) sample digestion by Li metaborate fusion (method FUS); and (d) microwave digestion of samples with HF+aqua regia in Teflon bombs (method MICRO). Three replications of three standard reference materials (SRMs), fine-earth (<2 mm) from 12 soils, and the clay (<2 urn) from 10 of those soils were analyzed. Method HF+AR shows the most consistent statistical agreement with the certified SRM values. Analysis of variance (ANOVA) indicates significant effects (α=0.05) for method of digestion, nonsignificant effects for method times SRM and method times clay, but significant effects for method times fine-earth. Composition and/or variability of material are significant factors in the method of digestion. Method HF+AR yields 1

show abstract

“…Traditional soil sample preparation methods for destruction of organic matter and dissolution of the mineral components are of three types: (a) ashing, followed by dissolution of ash in acid (Katz and Jenniss, 1987), (b) digestion with an acid mixture, e.g. Willett and Zarcinas (1986) applied dissolution in boiling HNO 3 acid, while Zarcinas et al (1989) used HNO 3 -HC1O 4 dissolution procedure and Kparmwang et al (1995) recommended HC1O 4 -HF-HC1 prior to elemental analysis, and (c) microwave digestion with an acid mixture in a closed or open digestion bomb (Warren et al, 1990.;Ammons et al, 1995). However, Jones (1978) noted a general trend of decreasing recovery with increased ashing time for dry ashing.…”

Section: Introductionmentioning

confidence: 99%

Analytical methods and quality assurance

Kovács

Prokisch

Győri

et al. 2000

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

A wet digestion method of soil samples has been developed for analysis of "total" concentration (acid extraction) of elements by inductively coupled plasma emission spectrometry (ICP-AES). This HNO 3 -H 2 O 2 wet digestion method is a simple, fast and safe sample preparation method with satisfactory accuracy and precision. The first examined condition was the applied digestion acid or acid mixture (HNO 3 , HNO 3 -H 2 O 2 , HCl-H 2 O 2 , HNO 3 -HClO 4 , H 2 SO 4 -H 2 O 2 ), and the volume of concentrated nitric acid (65% HNO 3 ). Temperature and duration of predigestion, volume of concentrated hydrogen-peroxide (30 % H 2 O 2 ), temperature and duration of digestion were also investigated. Two different kind of soil samples (a sandy soil with low humus content, calcareous chernozem with relatively high humus content), three different dry weight values and three different values for each parameters were chosen to investigate soil sample digestion in order to select the best parameters. A LABOR MIM Electronic Block Digest Apparatus was applied for sample preparation and numerous elements (e.g. Al, As, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Pb, S, Sr, Zn) have been measured by a LABTAM 8440M Inductively Coupled Plasma Emission Spectrometer. The optimum values of parameters to digest soil sample in an electronic block digest apparatus are: a) 1 g dry weight, b) 5 cm 3 HNO 3 as digestion acid, c) 30°C-60°C temperature range for 30-60 minutes predigestion, d) 5 cm 3 30% H 2 O 2 , e) 120 C temperature for 270 minutes digestion. Two soil samples were digested with four methods (block digestion, Milestone microwave, Prolabo focused microwave and Hungarian standard). Results of the two microwaves and detailed block digestion methods are in well agreement in the two soil samples. Finally three Standard Reference Materials were applied to compare the appropriate results. These results showed well agreement for all elements except for aluminium and iron content. The difference between certified and measured results is dependent on their concentrations in soil.

show abstract

An application of a modified microwave total dissolution technique for soils

Cited by 19 publications

References 6 publications

The role of different soil sample digestion methods on trace elements analysis: a comparison of ICP-MS and INAA measurement results

The role of different soil sample digestion methods on trace elements analysis: a comparison of ICP-MS and INAA measurement results

Total elemental analysis digestion method evaluation on soils and clays

Analytical methods and quality assurance

Contact Info

Product

Resources

About